Fix writing of property maps without any properties. fixes #144

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@1122 f203690c-595d-4dc9-a70b-905162fa7fd2

1 files changed, 7 insertions, 1 deletions

diff --git a/src/main/java/com/healthmarketscience/jackcess/impl/PropertyMaps.java b/src/main/java/com/healthmarketscience/jackcess/impl/PropertyMaps.java
index 01d4dfd..3a63aba 100644
--- a/src/main/java/com/healthmarketscience/jackcess/impl/PropertyMaps.java
+++ b/src/main/java/com/healthmarketscience/jackcess/impl/PropertyMaps.java
@@ -213,12 +213,18 @@ public class PropertyMaps implements Iterable<PropertyMapImpl>
         }
       }
 
+      if(propNames.isEmpty()) {
+        return null;
+      }
+
       // write the full set of property names
       writeBlock(null, propNames, PROPERTY_NAME_LIST, bab);
 
       // write all the map values
       for(PropertyMapImpl propMap : maps) {
-        writeBlock(propMap, propNames, propMap.getType(), bab);
+        if(!propMap.isEmpty()) {
+          writeBlock(propMap, propNames, propMap.getType(), bab);
+        }
       }
       
       return bab.toArray();